name: Duration
type: Duration
description: |+
    A Duration represents a signed, fixed-length span of time represented
     as a count of seconds and fractions of seconds at nanosecond
     resolution. It is independent of any calendar and concepts like "day"
     or "month". It is related to Timestamp in that the difference between
     two Timestamp values is a Duration and it can be added or subtracted
     from a Timestamp. Range is approximately +-10,000 years.

     # Examples

     Example 1: Compute Duration from two Timestamps in pseudo code.

         Timestamp start = ...;
         Timestamp end = ...;
         Duration duration = ...;

         duration.seconds = end.seconds - start.seconds;
         duration.nanos = end.nanos - start.nanos;

         if (duration.seconds < 0 && duration.nanos > 0) {
           duration.seconds += 1;
           duration.nanos -= 1000000000;
         } else if (duration.seconds > 0 && duration.nanos < 0) {
           duration.seconds -= 1;
           duration.nanos += 1000000000;
         }

     Example 2: Compute Timestamp from Timestamp + Duration in pseudo code.

         Timestamp start = ...;
         Duration duration = ...;
         Timestamp end = ...;

         end.seconds = start.seconds + duration.seconds;
         end.nanos = start.nanos + duration.nanos;

         if (end.nanos < 0) {
           end.seconds -= 1;
           end.nanos += 1000000000;
         } else if (end.nanos >= 1000000000) {
           end.seconds += 1;
           end.nanos -= 1000000000;
         }

     Example 3: Compute Duration from datetime.timedelta in Python.

         td = datetime.timedelta(days=3, minutes=10)
         duration = Duration()
         duration.FromTimedelta(td)

     # JSON Mapping

     In JSON format, the Duration type is encoded as a string rather than an
     object, where the string ends in the suffix "s" (indicating seconds) and
     is preceded by the number of seconds, with nanoseconds expressed as
     fractional seconds. For example, 3 seconds with 0 nanoseconds should be
     encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
     be expressed in JSON format as "3.000000001s", and 3 seconds and 1
     microsecond should be expressed in JSON format as "3.000001s".

__proto:
    package: google.protobuf
    targetfile: duration.proto
    imports: []
    options:
        cc_enable_arenas: "true"
        csharp_namespace: Google.Protobuf.WellKnownTypes
        go_package: google.golang.org/protobuf/types/known/durationpb
        java_multiple_files: "true"
        java_outer_classname: DurationProto
        java_package: com.google.protobuf
        objc_class_prefix: GPB
fields:
    seconds:
        type: int64
        description: |-
            Signed seconds of the span of time. Must be from -315,576,000,000
             to +315,576,000,000 inclusive. Note: these bounds are computed from:
             60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
        __proto:
            number: 1
            oneof: ""
        __ui:
            component: ""
            flags: []
            noinit: false
            noskip: false
        meta:
            default: ""
            hint: ""
            label: label.Duration.seconds
            options:
                flags: []
                list: []
            readonly: false
            repeated: false
            typespecific: null
        constraints: {}
    nanos:
        type: int32
        description: |-
            Signed fractions of a second at nanosecond resolution of the span
             of time. Durations less than one second are represented with a 0
             `seconds` field and a positive or negative `nanos` field. For durations
             of one second or more, a non-zero value for the `nanos` field must be
             of the same sign as the `seconds` field. Must be from -999,999,999
             to +999,999,999 inclusive.
        __proto:
            number: 2
            oneof: ""
        __ui:
            component: ""
            flags: []
            noinit: false
            noskip: false
        meta:
            default: ""
            hint: ""
            label: label.Duration.nanos
            options:
                flags: []
                list: []
            readonly: false
            repeated: false
            typespecific: null
        constraints: {}
